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Anthropic: Claude Sonnet 4.5
anthropic/claude-sonnet-4.5
VisionTool useJSONReasoningStreaming
Claude Sonnet 4.5 is Anthropic’s most advanced Sonnet model to date, optimized for real-world agents and coding workflows. It delivers state-of-the-art performance on coding benchmarks such as SWE-bench Verified, with...
Pricing
Input
$3.00 / 1M
Output
$15.00 / 1M
Specs
Context
1,000,000 tokens
Input
text, image, file
Output
text
Knowledge cutoff: 2025-01-31
Released: 2025-09
Supported parameters
include_reasoningmax_tokensreasoningresponse_formatstopstructured_outputstemperaturetool_choicetoolstop_ktop_p